internal->sub_range is unsigned, a negative won't get noticed.
Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>
---
diff --git a/drivers/media/dvb/frontends/stb0899_algo.c b/drivers/media/dvb/frontends/stb0899_algo.c
index 83dc7e1..2ea32da 100644
--- a/drivers/media/dvb/frontends/stb0899_algo.c
+++ b/drivers/media/dvb/frontends/stb0899_algo.c
@@ -464,13 +464,14 @@ static void next_sub_range(struct stb0899_state *state)
if (internal->sub_dir > 0) {
old_sub_range = internal->sub_range;
- internal->sub_range = MIN((internal->srch_range / 2) -
+ if (internal->tuner_offst + internal->sub_range / 2 >=
+ internal->srch_range / 2)
+ internal->sub_range = 0;
+ else
+ internal->sub_range = MIN((internal->srch_range / 2) -
(internal->tuner_offst + internal->sub_range / 2),
internal->sub_range);
- if (internal->sub_range < 0)
- internal->sub_range = 0;
-
internal->tuner_offst += (old_sub_range + internal->sub_range) / 2;
}
--
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